Improving the Wear Resistance of Profiled Parts of Binding Equipment by Forming a Microrelief Using the Ultrasonic Burnishing Method

The object of this research is the process of improving the wear resistance of profiled components of bookbinding equipment by forming a strengthening microrelief using ultrasonic rolling. The study considers the contact interaction between a spherical indenter and the surface of steel parts to determine the mechanisms of microrelief formation and its effect on wear behavior. The study is analytical and theoretical in nature, based on mathematical modeling of contact loading, microplastic deformation, and surface roughness parameters induced by ultrasonic rolling. A modified wear model is proposed, which incorporates the effects of surface microgeometry, residual stresses, and local hardness. The main hypothesis of the research is that the formation of a controlled microrelief on the surface of components reduces wear intensity due to the redistribution of contact pressure, reduction of actual contact area, and increased microhardness of the treated layer. The proposed mathematical model of local wear enables a quantitative assessment of the influence of geometric and mechanical characteristics of the microrelief on the operational durability of surfaces. The model can be adapted to different materials and ultrasonic rolling parameters. The obtained results may serve as the basis for further justification of optimal parameters for the strengthening of profiled components in bookbinding mechanisms, considering indenter geometry, material properties, and mechanisms of residual stress accumulation.